header {
	background-image: url("../image/header/safety.jpg");
	background-position: center center;
}

.safety-image {
	width: 100%;
}

@media only screen and (-webkit-min-device-pixel-ratio: 2),
	only screen and (min--moz-device-pixel-ratio: 2),
	only screen and (-o-min-device-pixel-ratio: 2/1),
	only screen and (min-device-pixel-ratio: 2),
	only screen and (min-resolution: 192dpi),
	only screen and (min-resolution: 2dppx) {
	header {
		background-image: url("../image/header/safety@2x.jpg");
	}
}

@media only screen and (min-width: 1500px) {
	header {
		background-image: url("../image/header/safety@2x.jpg");
	}
}